While dark energy remains one of the great mysteries of cosmology and particle physics, it seems to be mathematically equivalent to the cosmological constant that Einstein suggested in 1917. In the ...

The clearest pictures yet of the newborn cosmos strengthen the prevailing model of the universe but deepen a mystery about its expansion rate. Measurements of this rate, known as the Hubble constant, ...

The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

Astronomers who examined the sound waves from the Big Bang say that the Earth — and the entire Milky Way galaxy we call home — could be trapped in a huge void billions of light years across. Their ...

Prologue: From myth to reality: Astronomy : the endless frontier ; Charting and modeling the heavens ; Copernicus : "the last of the Greek cosmologists" ; Galileo : a new approach to mechanics and ...